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Finding the Fourth Proportional to 19,659,789.84, 29,489,659.40 and 5,282,857.80

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Solution

The fourth proportional to 19,659,789.84, 29,489,659.40 and 5,282,857.80 is: 7,924,279.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,659,789.84 : 29,489,659.40 = 5,282,857.80 : x
  2. Step 2: Convert to fraction form
    19,659,789.84/29,489,659.40 = 5,282,857.80/x
  3. Step 3: Cross multiply
    19,659,789.84x = 29,489,659.40 × 5,282,857.80
  4. Step 4: Simplify right side
    19,659,789.84x = 155,789,677,180,633.31
  5. Step 5: Solve for x
    x = 155,789,677,180,633.31/19,659,789.84
  6. Step 6: Final answer
    x = 7,924,279.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.